/Engine/Source/Editor/MaterialEditor/Public/MaterialPropertyHelpers.h
Gets the expression description of this parameter from the base material
static [FText](API\Runtime\Core\Internationalization\FText) GetParameterExpressionDescription ( [UDEditorParameterValue](API\Editor\UnrealEd\MaterialEditor\UDEditorParameterValue) * Parameter, [UObject](API\Runtime\CoreUObject\UObject\UObject) * MaterialEditorInstance )